Spectroelectrochemical phenomena on surface plasmon resonance of Au nanoparticles immobilized on transparent electrode

Jong Eun Park, Toshiyuki Momma, Tetsuya Osaka*

*この研究の対応する著者

研究成果: Article査読

44 被引用数 (Scopus)

抄録

Different shapes (nanosphere or nanorod) of gold nanoparticles (Au-NPs) were synthesized with and without ultrasonic irradiation in the presence of citric acid. Spherical-shaped and rod-shaped Au-NPs showed different surface plasmon resonance (SPR) absorption bands. The Au-NPs with different shapes were immobilized on a monolayer of 3-aminopropyltriethoxysilane (APS) coated on an indium-tin oxide (ITO) electrode. The potential dependence of the SPR band of different shaped Au-NPs in an aqueous solution was explored. The SPR band and intensity changes of the Au-NPs were found to depend on the applied potential. The spherical-shaped and rod-shaped Au-NPs showed different SPR absorption behaviors when potential was applied. These behavior changes were interpreted as the result of the potential-induced changes of the local dielectric environment around the nanoparticles due to molecular absorption/desorption and the charging/discharging of the particles.

本文言語English
ページ(範囲)5914-5923
ページ数10
ジャーナルElectrochimica Acta
52
19
DOI
出版ステータスPublished - 2007 5 25

ASJC Scopus subject areas

  • 化学工学(全般)
  • 電気化学

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